package demo3;
class B {
    public B() {
        func();
    }

    public void func() {
        System.out.println("B::func()...");
    }
}

class D extends B {
    private int num = 1;
    @Override
    public void func() {
        System.out.println("D.func() "+num);
    }
}



public class Test {
    public static void main(String[] args) {
        D d = new D();
    }
}
